Blowing-engine valve.



PATENTBD MAY 30, 1905.

A. T. KELLER. BLOWING ENGINE VALVE.

APPLICATION FILED JULY 1. 1904.

ZSHEETS-SHEET l.

INVENTOR N6. 790,964. PATENTED MAY 31), 1905. A. T. KELLER. BLOWING-ENGINE VALVE.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR No.790,964. Patented May 30, 1905.

TTED STATES PATENT Erica.

ALBERT T. KELLER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TOMESTA MACHINE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

BLOWING-ENGINE VALVE.

SPECIFICATION forming part of Letters Patent No. 790,964, dated May30,1905. Application filed July 1, 1904:. Serial No. 214,962.

T (071/ m i m y concern: valve is provided with a suitable stuflin'g-boxBe it known that I, ALBERT T. KELLER, of through which the piston-rodpasses, but in Pittsburg, Allegheny county, Pennsylvania, other respectsis similar to the inner cage 12 have invented a new and usefulBlowing-Enshown in the upper head 5 for the upper in- 5 gine Valve, ofwhich the following is a full, let-valve.

clear, and exact description, reference being The valve is provided onits outer surface had to the accompanying drawings, forming with twopacking-rings 14 and 15 of any suit- 55 part of this specification, inwhich able character, which engage the inner sur- Figure 1 is a sideelevation, partly broken face of the valve-cage 9, and it isreciprooated away, showing a vertical blowing-engine proby two rods 16,which may be screwed into vided with my improved inlet-valve. Fig. 2 thevalve and extend out through stuflingis a top plan view of the same.Fig. 3 is a boxes 17, preferably formed in a flange por- 6Ocross-section on the line IV IV of Fig. 4, and tion of the inner cage,which extends over and Fig. 4c is a side elevation of the valve with theis secured to the outer end of the outer cage.

cage broken away. These valve-rods are pivoted at their outer Myinvention relates to the class of blowends to rock-arms 18, extendingtoarock-shaft ing-engine valves, and more particularly to the 19,connected by crank with a moving part 5 inlet-valves. of the engine.

The object of the invention is to provide a The inner end of the annularvalve 13 and 20 simple and effective construction in which the the lowerend of the inner cage 12 provide an clearance shall be small and thevalve not liainternal recess to receive a hub or boss 21, ble to get outof order. It is also easily acprojecting centrally from the piston 3,and the cessible, balanced, and symmetrically located. piston-rod ispreferably secured to the piston In the drawings, 2 represents thecylinder by a nut 22, which is arranged to enter acen- 5 of a verticalblowing-engine having a piston tral recess formed in the inner closedhead 23 3 and piston-rod 4:. Each head of the cylinof the cage 12. Theboss on the piston subder is cast in hollow form, affording achamstantially fills up the clearance-space, and thus ber 5, whichextends aroundthe inlet-valve13, reduces the amount of clearance.

7 7 are the outlet-valvesin the wind-box 5, As shown in Figs. 3 and 4,the inner cage 30 which is connected at 8 to the channel for is providedwith longitudinal outer grooves or leading the compressed air to thereservoir or recesses 24 to provide space for the valve-rods source ofuse. 16, the annular space between the two cages 8b The central portionof each head with rebeing insufficient in the form shown to accomspectto the cylinder is cut away or formed modate these rods.

35 open in the act of casting, and into this circu- In the operation ofthe engine when the inlar hole is fitted the removable annularvalvelet-valve is opening the inlet-valve and the cage 9, which may bebolted or secured in any piston move away from each other, and thesuitable manner. This cage has an annular full opening occurs at anydesired point, but shouldered engagement 10 with the inner wallpreferably near the mid-stroke of the piston.

4 of the head and is provided with an annular During the latter portionof the stroke of the series of inclined ports-separated by inclinedpiston the inlet-valve starts to close and bridges 11. reaches itsclosed position when the piston Within the cage 9 is fitted an annularholreaches the end of its stroke. The air enters low concentric cage 12,which is of less length the head 5 through the openings 6, surrounds 45than the outer cage and of smaller diameter, outer cage 9 for valve 13,and then passes into leaving an annular space between the two thecylinder through the ports in the cage 9 cages in which slides theannular valve 13. when the valve is open. The inner cage for the lowerhead and inlet- The inlet-valve 13 is closed by actuating connectionsbetween the valve-rods 16 and the moving element of the engine.

The outlet-valves 7 7 control theadmission of air from thecompressor-cylinder to the wind-box, and these valves open automaticallywhen the desired compression has been reached and are closed by suitableconnections to a moving element on the engine.

The advantages of my invention result from the simplicity and cheapnessof the valve, the reducing of the clearance, the balancing of the valve,and the symmetrical actuating connections which act upon both sides ofthe valve simultaneously. The number of packings is small, and the valveis not liable to get out of order.

Many variations may be made in the form and arrangement of the engine,the valve, and actuating connections without departing from myinvention.

I claim* 1. In ablowing-engine, a cylinder having a chambered headprovided with ports, a pair of concentric valve-cages fitting centrallyin said head, the outer cage having ports leading into the cylinder andarranged to connect the chamber of the head therewith, an annular valvearranged to reciprocate between the cages and connections for actuatingsaid valve; substantially as described.

2. In a-blowing-engine, a hollow head having an air-chamber providedwith inlet-open.- ings, a pair of concentric cages fitting centrally insaid head, the outer cage having ports leading from the chamber of thehead into the cylinder, an annular valve arranged to reciprocate betweenthe cages, said valve having outer packingrings, and actuatingconnections for the valve; substantially as described.

3. In a blowing-engine, a cylinder having a chambered head provided withports, a pair of concentric annular valve-cages extending centrallywithin the head, an annular valve ar' ranged to reciprocate between thecages and connect or disconnect the head-chamber with the cylinder, anda projection on the blowingengine piston arranged to enter the recessafforded by the valve and the inner cage; substantially as described.

4. In a blowing-engine, a head having a chamber provided with ports, anouter annular cagefitting within the chamber and having an annular rowof ports, an inner closed holloW cage fitting within the ported cage andproviding an annular'space between them, an outer closure for theannular space, an annular valve arranged to reciprocate between thecages and a plurality of actuating-rods connected to the valve andextending outwardly through the closure for the space betweenthe twocages; substantially as described.

5. In a blowing-engine, a head having a chamber provided with ports, anannular cage removably secured within the chamber, and having an annularrow of ports leading through it, an inner closed valve-cage having arecess at its inner end, an annular valve arranged to reciprocatebetween the two cages and having outer packing-rings, the inner portionof the valve having a recess, actuating connections for the valve, and aboss and nut on the piston arranged to enter the recess afforded by thevalve and inner cage; substantially as described.

In testimony whereof I have hereunto set my hand.

ALBERT T. KELLER. Witnesses:

LENDELL A. CONNER, J r., GEO. B. BLEMING.

